According to the general rule, a direct question takes a question mark at the end whereas, a period is used at the end of an indirect sentence. The given sentence is in the form of a direct question. Thus, the correct answer is Option A.
The remaining options are incorrect.
Options B and C are incorrect - As a rule, the letter 'I' when referring to yourself must always be capitalized.
Option D is incorrect - The first letter of the sentence is not capitalized and a question mark is not used at the end.